Kneading and mixing machine.



R. HERBST & A. BARTOSCH.

KNEADING AND MIXING MACHINE.

APPLICATION FILED JULY 30. 1914.

Patented Oct. 17,1916.

2 SHEETS-SHEET l R. HERBST & A BARTOSCH.

KNEADHSI G AND MIXING MACHINE.

APPLICATION FILED JULY 30' I914.

Patented Oct. 17, 1916.

2 SHEETS-SHEET 2.'

RICHARD HERBST AND ALEXANDER BARTOSCH, OF HALLE-ON-TIIE-SAALE, GERMANY.

KI 1'EADING AND MIXING MACHINE.

Specification of Letters Patent.

Application filed July 30, 1914. Serial No. 854,144.

chines; and we do hereby declare the-followsing to be a full,-clear, andexact description of the invention, such as will enable others skilledin the art to which'it appertains to make and use the same, referencebeing had to the accompanying drawings, and .to letters or figures ofreference marked thereon, which form a part of this specificationj Theinvention relates to. a kneading and mixing machine for doughlikesubstances,

in which the kneading lever is caused to describe conical movements, thedriven end of said lever being moved by a crank or crank disk.

The essential feature of the invention consists in arranging the plan ofthe crank or crank disk horizontally inthe lower part of the machineframe, while the pivoted joint of said kneading lever is above saidcrank or crank shaft, the machine frame being preferably of a more orless conical shape. Further the operative end of the kneading arm mustbe bent at an acute angle into the kneading trough. This constructionhas the advantage that the frame occuthe work of the baker, and, if theframe is closed, the entire driving mechanism for the kneading lever canbe covered by the same. Of essential importance is further the manner ofsupporting the kneading lever by means of a ball with a circumferentialgroove or by another construction of universal joint, in which thekneading lever is adapted to be moved longitudinally by a screw thread.The invention affords further the possibility, if a freely rotatingkneading trough is not used, of driving the trough by means of wormgearing from the same shaft by which the kneading lever is driven.Further to the same kneading rod two kneading arms can be attached whichwork alternately in two opposite troughs.

In the drawing Figure 1 is a side elevation of one construction of thenew machine,

for driving same. Fig. 5 is a side elevation and Fig. 6 across-sectional new on lme B 111 Fig. 5 of a kneadlng' machine wlth twotroughs. Figs. 7 and 8 show a section and plan respectively of a specialuniversal oint for carrying the knead ng lever.

Patented Oct. 17-, 1916. I

l is the frame of themachine (Fig. 1), in which the horizontalspur-wheel 5 is pro-' vided. In a hole of this spur-wheel engages thelever 3 by means of the pin 4. The frame 20f the machine has a conicalshape and is topped by a sleeve 10 which keeps the ball 9 in position.Through this ball passes the kneading arm 3 theend 7 of which is bentdown at an acute angle into the trough.

Sis the driving shaft carrying a worm, i

which engages in the spur-wheel 5. By this means the lever 3 is causedto move in a conical path so that its operative end 7 carry out thekneading process.

It is of importance to provide as large a stroke as possible for theoperative" end of the kneading'lever. This isobtained in the followingmanner: The lever 3 is fastened to theball 9 for example-by a wedge. Inthe ball 9 there is a circumferential groove 12 at right angles to theaxis of the lever 3. In

this groove engage pins 13 attached to the frame 2. By thiscircumferential groove and the pins engaging therein the kneading lever3 is guided in such a manner that a large kneading curve 15 isobtainecHFig. 4); pies but very little space, which faclhtates 7 16 isthe normal kneading curve, which is convcrtedinto the much larger curve15 by the device described.

Fig. 4 shows that the frame 2 need not be closed, but may be formed ofseparate standment'of the kneading arm 7 which meets with resistance inthe dough,the movement belng controlled by intermittently operatingbrakes.

Instead of the crank disk 5 any other crank device can be provided.

In Fig. 5 the kneading lever 3 carries two kneading arms 7, which engagealternately in the two troughs 6 provided on opposite sides. In thisfigure mechanism for specially driving the troughs is shown, the shaft17 being provided with worms 19,20, 19, which engage in correspondingworm-wheels 18, 5, 18. By this means the kneading device and troughs areconnected together in the simplest manner.

The kneading troughs, as shown in Fig. 6, are moved in the direction ofthe arrows toward the shaft 17.

Figs, 7 and 8 represent another form of universal joint which can beused instead of the ball 9, The pins 25 of the ring 22 are journaled inthe frame 2 or sleeve 10, while the middle ring 23 is journaled in theouter ring 22 by means of the pins 2%. ()n the kneading lever there arescrew threads 21 which are provided for the following pur-' choosing asuitable form for these screwthreads the lever may be caused to move inany desired path as in the case of Fig. 4.

By suitably choosing the position of the circumferential groove shown inFigs. 2 and 3, or by the choice of the screw thread in the constructionshown in Figs. 7 and 8, it is possible to adapt the curve described bythe op erative end of the lever to the shape of the trough.

Both the bearing of the end 4 of the knead ing arm and the bearing ofthe universal joint can be carried out in the most various manners. Itis essential that the crank disk 5, or other crank device, at the lowerpart of the frame, be horizontal and that the universal oint be abovethe same in the frame, so that the frame, which is preferably of aconical shape, can inclose the entire mechanism.

What we claim and desire to secure by Letters Patent of the UnitedStates is 1. A kneading and mixing machine, comprising in combination, ahorizontal crank device, a kneading lever engaging its lower end withsaid crank device, a means carrying said kneading lever and arrange labove said crank device, screw threads on said kneading lever engagingin said lever carrying means, and a kneading trough into which theoperative end of the kneading lever is bent at an acute angle,substantially as, and for the purpose set forth.

2. A kneading and mixing machine, comprising in combination, ahorizontal crank device, a kneading lever engaging at its lower end withsaid crank device, a ball on said lever above said crank device andhaving a circumferential groove therein, pins projecting into saidgroove, and a kneading trough into which the operative end of thekneading lever is bent at an acute angle, substantially as, and for thepurpose specified.

In testimony whereof we affix our signatures in presence of twowitnesses.

RICHARD HERBST. ALEXANDER BARTOSCl-l.

i Vitnesses .VM. P. KENT, RUDOLPH Fniok'e.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

